By BH-SK-I produced non-contact infrared lamp switch circuit shown in Figure 3-42, it is mainly by voice integrated circuits, infrared light-emitting tube and receiving tube, c
Click here to download the full size of the above Circuit.
omposed of the triac circuit and power circuit where part. Switch back to the main route SCR vs, diode VD4-- VD7 composed vs when opened, lamp H lights, vs shut off, the lamp goes out. Control loop by voice integrated circuits, infrared light-emitting and receiving tubes and other components. Electrical control loop source transformer T Buck, VD2, VD3 full-wave rectification and c] filtering supply, cl ends around 8V DC output voltage through the resistor Rl the infrared light emitting tube LED lights radiate infrared light. R2, VD1 and C3 composed of simple regulator circuit, stable output 6V DC voltage supply manifold A voice electricity. FIG VT phototransistor with an infrared receiver, since the sake of alignment, the LED emitted infrared light can not be incident on the VT, it is usually an integrated circuit in a steady voice state, set this state, 12-pin output low power level, vs off, the lamp H does not shine. If the finger waving in front panel switch, since the reflection of the finger, the LED emitted infrared light irradiated onto the VT, VT equivalent resistance becomes so small, that the manifold input pin l get a low trigger signal, internal bistable circuit flip, increased from 12 feet on the low to high, vs opened, H lamp lit. If we switch panel in the front waving, Manifold l feet and get a trigger signal, the internal flip-flop circuit Zhi Yi flip times, 12 feet from the high to the low level it, vs off, the lamp H goes out.
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: